Wadanne Sharuɗɗa Ya Kamata Kwararren PCB Ya Haɗu?

A SMT aiki, PCB substrates kafin a fara aiki, da PCB za a duba da kuma gwada, da PCB za a zaba don saduwa da SMT samar da bukatun na PCB, da kuma unqualified koma PCB maroki, da takamaiman bukatun na PCB za a iya koma zuwa. Ipc-a-610c International General Electronics Industry Assembly Standards, waɗannan sune wasu mahimman buƙatun sarrafa SMT na PCB.

1. PCB dole ne ya zama lebur da santsi

PCB general bukatun lebur da santsi, ba zai iya warp up, ko a cikin solder manna bugu da SMT inji jeri zai haifar da babbar illa, kamar sakamakon fasa.

2. Thermal watsin

A cikin reflow soldering inji da kalaman soldering inji, za a yi preheat yankin, yawanci don dumama PCB a ko'ina, kuma zuwa wani zafin jiki, mafi kyau thermal conductivity na PCB substrate, samar da ƙasa mara kyau.

3. Juriya mai zafi

Tare da ci gaban SMT tsari da muhalli bukatun, gubar-free tsari ya kuma an yadu amfani, amma kuma lalacewa ta hanyar Yunƙurin a waldi zafin jiki, da zafi juriya na PCB mafi girma bukatun, gubar-free tsari a reflow soldering, zafin jiki ya kamata. isa 217 ~ 245 ℃, lokacin yana 30 ~ 65s, don haka janar PCB zafi juriya zuwa 260 digiri Celsius, da kuma karshe 10s bukatun.

4. Adhesion na jan karfe

Ƙarfin haɗin kai na tagulla ya kamata ya kai 1.5kg/cm² don hana PCB daga faɗuwa saboda ƙarfin waje.

5. Lankwasawa ma'auni

PCB yana da ƙayyadaddun matakan lankwasawa, gabaɗaya don cimma fiye da 25kg/mm

6. Kyakkyawan ƙarfin lantarki

PCB a matsayin m na lantarki aka gyara, don cimma mahada tsakanin aka gyara, don dogara da PCB Lines don gudanar, PCB kamata ba kawai da kyau lantarki watsin, da PCB Lines karya ba zai iya kai tsaye faci up, ko yi na dukan samfurin. zai haifar da babban tasiri.

7. Zai iya jure wa wanke-wanke

PCB a cikin samarwa, mai sauƙi don ƙazanta, sau da yawa yana buƙatar wanke ruwan jirgi da sauran abubuwan da ake amfani da su don tsaftacewa, don haka PCB ya kamata ya iya tsayayya da wankewar ƙarfi, ba tare da samar da kumfa da wasu halayen halayen ba.

Waɗannan su ne wasu mahimman buƙatun don ƙwararrun PCB a cikin sarrafa SMT.